Abstract: A silver-plated structure formed on a surface of a metallic base material includes: a pretreatment layer formed by washing the surface of the base material with a pretreatment agent; a resin paint film layer formed on a surface of the pretreatment layer; and a silver plating layer formed on a surface of the resin paint film layer. The silver plating layer includes: a silver film formed by a silver mirror reaction; an undercoat film that causes the silver film to adhere to the surface of the resin paint film layer; and a topcoat film that protects a surface of the silver film.

Abstract: A fork lift with a laterally travelling system, wherein when a running mode is switched from a normal running in which right and left front wheels and rear wheels face in a longitudinal direction to a lateral running, rotating means is operated to rotate a turning member about a vertical axis in order to change the direction of the front wheels relative to that of a vehicle body, a change in running direction can be performed smoothly because the front wheels are formed integrally with a running drive device, and the front wheels are driven in forward and reverse directions by the running drive device after the front wheels are turned to face sideways so that a fork lift can run laterally and the rear wheels can be changed in direction in a follow-up manner by a turning caster system or can be changed in direction forcibly in the same manner as the front wheels, whereby the wheels of a drive system, though the fork lift is of a type capable of performing a normal forking operation, can be steered to face side

Abstract: A vehicle body (2) is provided with front wheels (3) installed to be turnable around vertical axes (27), front wheel turning means (30) for turning the front wheels, rear wheels (4.) installed to be turnable around vertical axes (49), and rear wheels turning means (50) for turning the rear wheels. The vertical axes (27, 49) of the front-and rear wheels (3, 4) are positioned outwardly of tread centers (3a, 4a) for longitudinal travel, so that on switching to transverse travel, the front wheels (3) can be turned laterally and forwardly and the rear wheels (4) can be turned laterally and rearwardly with respect to the vehicle body (2). This enables the center distances between the right and left wheels and between the front and rear wheels to be greater than those for longitudinal: travel, thus improving stability for transverse travel.

Abstract: A fork lift with a laterally travelling system, wherein when a running mode is switched from a normal running in which right and left front wheels and rear wheels face in a longitudinal direction to a lateral running, rotating means is operated to rotate a turning member about a vertical axis in order to change the direction of the front wheels relative to that of a vehicle body, a change in running direction can be performed smoothly because the front wheels are formed integrally with a running drive device, and the front wheels are driven in forward and reverse directions by the running drive device after the front wheels are turned to face sideways so that a fork lift can run laterally and the rear wheels can be changed in direction in a follow-up manner by a turning caster system or can be changed in direction forcibly in the same manner as the front wheels, whereby the wheels of a drive system, though the fork lift is of a type capable of performing a normal forking operation, can be steered to face side

Abstract: A fork lift with a laterally travelling system, wherein when a running mode is switched from a normal running in which right and left front wheels and rear wheels face in a longitudinal direction to a lateral running, rotating means is operated to rotate a turning member about a vertical axis in order to change the direction of the front wheels relative to that of a vehicle body, a change in running direction can be performed smoothly because the front wheels are formed integrally with a running drive device, and the front wheels are driven in forward and reverse directions by the running drive device after the front wheels are turned to face sideways so that a fork lift can run laterally and the rear wheels can be changed in direction in a follow-up manner by a turning caster system or can be changed in direction forcibly in the same manner as the front wheels, whereby the wheels of a drive system, though the fork lift is of a type capable of performing a normal forking operation, can be steered to face side

Abstract: A learner individual study schedule document generating and providing system for supporting a teacher's work of providing an individual learner having a clear target with teaching materials suitable for a learner characteristic according to variations in study growth stage, comprising an access server to be connected to a communication network, a study menu Web server that is electrically connected to the access server, a learner-by-learner study menu generation server that is electrically connected to the study menu Web server, a learner study history database that is electrically connected to the learner-by-learner study menu generation server, a learner database that is electrically connected to the learner study history database, a teacher terminal that is electrically connected to the learner-by-learner study menu generation server, a study material link information database that is electrically connected to the learner-by-learner study menu generation server, a study schedule document database that is e